.canvas {
    font-family: tahoma;
}
.block {
    position: absolute;
    border: 1px solid #7DAB76;
    background-color: #BAFFB0;
    padding: 3px;
}
.connector {
    background-color: #FF9900;
}
.source-label, .middle-label, .destination-label {
    padding: 5px;
}
